Thulium Electrons per Shell (Tm) [& Color, Discovery ...

Atoms have electrons that need to be distributed somehow, even Thulium. Ok so where are these electrons in an atom of Tm?

In the case of Thulium the number of electons per shell is 2,8,18,31,8,2. Besides the distribution of electrons there is a lot of funny facts about Thulium that most don't know. Let me show you...

Thulium Overview

Thulium Electrons per Shell


Atomic Number


Learn more about the atomic number.


Soft, malleable, ductile, silvery metal

Atomic Symbol



Found with other rare earths in the minerals gadolinite, euxenite, xenotime, and monazite. Monazite is often 50% rare earth by weight and 0.007% thulium.

Atomic Mass


Learn more about the atomic mass.


Radioactive thulium is used to power portable x-ray machines, eliminating the need for electrical equipment.

Name Origin

From Thule ancient name of Scandinavia.

State at 20 °C



Discovered By: Per Theodor Cleve
Year: 1879
Location: Sweden

Want to learn more details and data about Thulium (Tm)? Check my Elements Comprehensive List.


Are you having trouble understanding the basics of atomic elements? This video will walk you through:
  • What is an element
  • What is a substance
  • What Elements look like
  • How a small number of atoms can be joined and form completely different substances

Colored Periodic Table

Need an editable periodic table to edit? Maybe add your school logo, work team or anything else to maker your paper look cool?

Along with basic atom / element information (like Thulium electrons per shell and all the other atomic data), it also comes with color coded info about: State (Gas, Liquid or Solid at room temperature), Groups/series details and much more...

How about an incentive to share this post? (You will help other colleagues find this blog)

Download and enjoy this complete and colored periodic table for you to edit and enjoy. It's in an editable excel format or .ods (open).
[lock][Download excel ##download##]
[Download open .ods format ##download##][/lock]


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That gives credibility to your paper and it is sometimes required in higher education.

To make your life (and citation) easier just copy & paste the information below into your assignment or essay:

Luz, Gelson. "Thulium Electrons per Shell (Tm) [& Color, Discovery ..." Materials. dd mmmm. yyyy. <URL>

Now replace dd, mmmm and yyyy with the day, month, and year you browsed this page. Also replace URL for the actual url of this page (The < and > stay, ok?). This citation format is based on MLA.


Who is Gelson Luz anyway?

Gelson Luz is a Mechanical Engineer, expert in welding and passionate about materials. Search for "Gelson Luz" in your favorite browser to learn more.

Materials: Thulium Electrons per Shell (Tm) [& Color, Discovery ...
Thulium Electrons per Shell (Tm) [& Color, Discovery ...
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